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- Ninghui Li, Tiancheng Li, Suresh Venkatasubramanian
- 2007 IEEE 23rd International Conference on Data…
- 2007
The k-anonymity privacy requirement for publishing microdata requires that each equivalence class (i.e., a set of records that are indistinguishable from each other with respect to certain… (More)
- Ninghui Li, John C. Mitchell, William H. Winsborough
- IEEE Symposium on Security and Privacy
- 2002
We introduce the RT framework, a family of Rolebased Trust-management languages for representing policies and credentials in distributed authorization. RT combines the strengths of role-based access… (More)
- Ninghui Li, William H. Winsborough, John C. Mitchell
- Journal of Computer Security
- 2003
We introduce a simple Role-based Trust-management language RT0 and a set-theoretic semantics for it. We also introduce credential graphs as a searchable representation of credentials in RT0 and prove… (More)
- Ninghui Li, Benjamin N. Grosof, Joan Feigenbaum
- ACM Trans. Inf. Syst. Secur.
- 2003
We address the problem of authorization in large-scale, open, distributed systems. Authorization decisions are needed in electronic commerce, mobile-code execution, remote resource sharing, privacy… (More)
- Qihua Wang, Ninghui Li
- ACM Trans. Inf. Syst. Secur.
- 2010
We propose the role-and-relation-based access control (R2BAC) model for workflow authorization systems. In R2BAC, in addition to a user’s role memberships, the user’s relationships with other users… (More)
- Ninghui Li, John C. Mitchell
- PADL
- 2003
Trust management (TM) is a promising approach for authorization and access control in distributed systems, based on signed distributed policy statements expressed in a policy language. Although… (More)
- Ninghui Li, Mahesh V. Tripunitara
- SACMAT
- 2004
Delegation is often used in administrative models for Role-Based Access Control (RBAC) systems to decentralize administration tasks. While the use of delegation greatly enhances flexibility and… (More)
- Ji-Won Byun, Ashish Kamra, Elisa Bertino, Ninghui Li
- DASFAA
- 2007
k-anonymization techniques are a key component of any comprehensive solution to data privacy and have been the focus of intense research in the last few years. An important requirement for such… (More)
- Ji-Won Byun, Ninghui Li
- The VLDB Journal
- 2006
In this article, we present a comprehensive approach for privacy preserving access control based on the notion of purpose. In our model, purpose information associated with a given data element… (More)
- Ninghui Li, Ziad Bizri, Mahesh V. Tripunitara
- ACM Conference on Computer and Communications…
- 2004
Separation of Duty (SoD) is widely considered to be a fundamental principle in computer security. A Static SoD (SSoD) policy states that in order to have all permissions necessary to complete a… (More)